442422 has 20 divisors (see below), whose sum is σ = 991716. Its totient is φ = 147420.

The previous prime is 442399. The next prime is 442439. The reversal of 442422 is 224244.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 442395 and 442404.

It is a congruent number.

It is an unprimeable number.

442422 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1204 + ... + 1527.

2⁴⁴²⁴²² is an apocalyptic number.

442422 is an abundant number, since it is smaller than the sum of its proper divisors (549294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

442422 is a wasteful number, since it uses less digits than its factorization.

442422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2745 (or 2736 counting only the distinct ones).

The product of its digits is 512, while the sum is 18.

The square root of 442422 is about 665.1481038085. The cubic root of 442422 is about 76.1983507610.

Adding to 442422 its reverse (224244), we get a palindrome (666666).

It can be divided in two parts, 44242 and 2, that added together give a palindrome (44244).

The spelling of 442422 in words is "four hundred forty-two thousand, four hundred twenty-two", and thus it is an iban number.